lvm2/test/lib/not.c

/*
 * Copyright (C) 2010 Red Hat, Inc. All rights reserved.
 *
 * This file is part of LVM2.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License v.2.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <unistd.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>

static int finished(const char *cmd, int status) {
	if (!strcmp(cmd, "not"))
		return !status;
	if (!strcmp(cmd, "should")) {
		if (status)
			fprintf(stderr, "TEST WARNING: Ignoring command failure.\n");
		return 0;
	}
	return 6;
}

int main(int args, char **argv) {
	pid_t pid;
	int status;
	int FAILURE = 6;

	if (args < 2) {
		fprintf(stderr, "Need args\n");
		return FAILURE;
	}

	pid = fork();
	if (pid == -1) {
		fprintf(stderr, "Could not fork\n");
		return FAILURE;
	} else if (pid == 0) { 	/* child */
		execvp(argv[1], &argv[1]);
		/* should not be accessible */
		return FAILURE;
	} else {		/* parent */
		waitpid(pid, &status, 0);
		if (!WIFEXITED(status)) {
			if (WIFSIGNALED(status))
				fprintf(stderr,
					"Process %d died of signal %d.\n",
					pid, WTERMSIG(status));
			/* did not exit correctly */
			return FAILURE;
		}

		return finished(argv[0], WEXITSTATUS(status));
	}
	/* not accessible */
	return FAILURE;
}